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mapreduce运行问题 :java.io.EOFException
来源:cnblogs  作者:zhuzhu&you  时间:2020/12/8 8:43:52  对本文有异议

写MapReduce  Dome 案例时i,报出 java.io.EOFException 

  1. java.lang.Exception: java.io.EOFException
  2. at org.apache.hadoop.mapred.LocalJobRunner$Job.runTasks(LocalJobRunner.java:462)
  3. at org.apache.hadoop.mapred.LocalJobRunner$Job.run(LocalJobRunner.java:529)
  4. Caused by: java.io.EOFException
  5. at java.io.DataInputStream.readFully(DataInputStream.java:197)
  6. at java.io.DataInputStream.readUTF(DataInputStream.java:609)
  7. at java.io.DataInputStream.readUTF(DataInputStream.java:564)
  8. at com.com.reducejoin1.TableBean.readFields(TableBean.java:99)
  9. at org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:71)
  10. at org.apache.hadoop.io.serializer.WritableSerialization$WritableDeserializer.deserialize(WritableSerialization.java:42)
  11. at org.apache.hadoop.mapreduce.task.ReduceContextImpl.nextKeyValue(ReduceContextImpl.java:146)
  12. at org.apache.hadoop.mapreduce.task.ReduceContextImpl.nextKey(ReduceContextImpl.java:121)
  13. at org.apache.hadoop.mapreduce.lib.reduce.WrappedReducer$Context.nextKey(WrappedReducer.java:302)
  14. at org.apache.hadoop.mapreduce.Reducer.run(Reducer.java:170)
  15. at org.apache.hadoop.mapred.ReduceTask.runNewReducer(ReduceTask.java:627)
  16. at org.apache.hadoop.mapred.ReduceTask.run(ReduceTask.java:389)
  17. at org.apache.hadoop.mapred.LocalJobRunner$Job$ReduceTaskRunnable.run(LocalJobRunner.java:319)
  18. at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
  19. at java.util.concurrent.FutureTask.run(FutureTask.java:266)
  20. at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
  21. at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
  22. at java.lang.Thread.run(Thread.java:748)

此问题为序列化错误

来看序列化当前类

 

 

 修改之后重新运行程序,问题解决

原文链接:http://www.cnblogs.com/zhuzhu-you/p/14043634.html

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